Cap for paste tubes



1951 H. L. MANZlONE ET A]. 2,998,170

CAP FOR PASTE TUBES Filed 001;. 25, 1957 5 Sheets-Sheet 1 IIYVENTOR HomeroLuls Mgnzlqne BY Rlcardo Jose Zenilo 8\ Abel Knobel g- 1961 H. MANZIONE ET AL 2,998,170

CAP FOR PASTE TUBES 3 Sheets-Sheet 2 Filed Oct. 25, 1957 INVENTORS Homero Luis Monziqne Y RICGI'dO Jose Zenllo 8 Abel Knobel ATTDDMI-V 7 1961 H. L. MANZIONE ET Al. 2,998,170

CAP FOR PASTE TUBES 3 Sheets-Sheet 3 Filed Oct. 25, 1957 lOfl BY Rlcardo Jose Zerill oz dyybel Knobe!v INVENTORQ Homgro LUIS Manz ATTORNEY United States Patent 2,998,170 CAP FOR PASTE TUBES Homero Luis Manzione, Ricardo Jos Zerillo, and Abel Knobel, all of Avenida Forest 463, Buenos Aires, Argentina Filed Oct. 25, 1957, Ser. No. 692,394 1 Claim. (Cl. 222-620) The present invention refers to a cap for paste tubes and the like having similar uses, and more particularly to a sealing device which, acting as a valve, based on a threading operation on the spout of the container, provides a great improvement in the case of containers adapted for tooth pastes, soap in paste and other products in pomade form.

This is a cap as any common type, but with an outflowing opening in its center as a nozzle, in combination with an obtuator, so that in one position the opening is closed, while in another position it is open.

To this end, the cap being of elastic plastic material, is funnel-shaped so that the widest part is threaded to the spout, interposing in its center a concentric disk which acts as a closure plate. Since the disk is supported by posts which isolate the walls with a surrounding space, when the cap is loosened and the paste tube is pressed, the paste passing by the sides is joined by convergence to thus flow through the mouth of the nozzle.

This means that without having to take oii the cap, and simply by rotating the latter, the contents of the tube is forced to flow out in the amount required.

For a greater clearness and comprehension of this device, it has been illustrated with several drawings in which:

FIG. 1 is a diarnetrical section of the cap.

FIG. 2 is a top plan view of the cap.

FIG. 3 is a vertical section of the cap applied to the tube and shown in the closed position.

FIG. 4 is a view similar to FIG. 3 showing the cap applied to the tube and shown in open position.

FIG. 5 is a longitudinal sectional view showing the pressing of the walls of the tube.

FIG. 6 is a perspective view of the container in the act of flowing out through the nozzle of the cap.

FIG. 7 is a longitudinal section of a modified cap showing a structure of the outlet opening.

FIG. 8 is a longitudinal section of the modified cap on the tube in closed position.

FIG. 9 is a longitudinal section of the cap of FIG. 7 in open position.

FIG. 10 is a perspective view of the tube with the modified cap showing the paste flowing out in tubular form.

In the difierent drawings the same reference numbers indicate the same or corresponding parts, the various elements being indicated by letters.

As may be seen in the drawings, a is the body of the cap having a capsule shape with interior thread 1 so as to mesh with the thread 2 of the spout of tube b.

Said capsule body a has a form which can be described as a round hollow body.

Furthermore, the capsule body a, in place of being closed, has a central opening which, with a projection forms the outflow nozzle 4, in such a manner that the cap, set with its thread 1 on the spout 2 remains as an additional end piece to said spout.

Since the cap is to act as a stopper in its principal role, the hollow part of the capsule body comprises in its center or closure disk an obturator 5 joined at the base of the nozzle 4 by means of rods or pillars 6 which, being parallel to the axis of the cap, they are set apart from each other; and said pillars act as separators, maintaining the obturator 5 or closure disk at a distance for the passage of the 2,998,170 Patented Aug. 29, 1961 "ice paste. Since said obturator is substantially of a smaller diameter than that of the hollow of the body, there remains a space between the surrounding part of the obturator 5 and the walls of said hollow portion so that the paste from the center of the cavity of the cap can pass through the open margin left by the obturator on its sides and behind same, thus reaching the outflowing nozzle 4.

The obturator 5 which is fiat, in that it is larger than the opening of the spout 2, is in condition to establish a seal against said spout when the cap is adjusted in the position of FIG. 3; in eifect when pressing the cap with the threaded part, the obturator 5 which is valvular is adapted to be adjusted against the outer edge of the spout 2 foaming a hemnetic seal without requiring any packing, since it is molded from elastic plastic material, the obturator disk operates as a packing.

Being in closed position, there is only to be made in reverse sense, a turn of the cap, so that the obturator 5 is separated from. spout 2 (FIG. 4) and leaves space for the outflow, so that by pressing its walls as shown in FIGS. 5, 6, 9 and 10, the paste, by pressure impulse passes the obturator through the sides so as to converge toward the center and flow through nozzle 4.

After extracting the paste, the cap is to be adjusted as shown in FIGS. 3 and 8 so as to obtain the closing of the tube through obturator 5 against the border of spout 2.

The fact that supports or lugs 6 maintain approximately a parallelism in relation to the virtual axis of the cap, has great technical importance, since these supports, acting as separators, are able to resist the pressure given to the adjustment of obturator 5 against the edge of spout 2; and said resistance avoids the yielding of the obturator in case the tube is pressed without the opening of the cap; which means that once the cap has been closed, as shown in FIG. 3, no matter how hard the tube is pressed, no alterations take place in the position of obturator 5.

In the examples of 'FIGS. 1 to 6, the obturator 5 is a type of central separation, so that the paste, after passing through its sides, converges in the center of the nozzle 4, so that when flowing out through the extreme end of said nozzle, the paste forms a solid bar.

In the form of FIGS. 7 to 10, since the obturator 5 has a projection 7, the convergence does not occur. In effect said projection 7 rises in the obturator 5 and in diminishing manner occupies a great part of nozzle 4 ending in projecting manner with a convexity on the plane of the outlet opening of said nozzle. Since said projection 7 leaves a certain space 8 in relation to its interior walls of the nozzle '4, the paste when passing through space 8 as shown in FIG. 9 flows in a tubular form; which means that when pressing the tube (FIGS. 9 and 10) a tube shaped extrusion is formed of unlimited length.

Thus, if the tube is used for tooth paste, the extrusion can be cut with the tooth brush, as is common, uncovering the convex extreme end of projection 7 by limiting through its center the outflowing mouth of the ring shaped section of paste.

Due to this, the only part that can be left exposed to the atmosphere is what is present on the border of the nozzle 4 and projection 7, that is practically a circumferential line of paste as may be seen.

Within the terms of the appended claim, various modifications of detail and structure may be made without departing from the scope or principles of the invention.

We claim:

A cap for paste tubes and the like comprising a round hollow body with open ends with an internal threaded portion at one end adapted to be threaded on a spout of the tube, the other end of the body having an outwardly reduced nozzle with an internally curved annular surface extending to the outlet end of the nozzle, a closure memher in the hollow body adapted to contact the spout of the ber past the lugs and over the curved surface out past the tube to close the latter and being provided with a domenozzle in a tube-shaped extrusion.

shaped part extending into the nozzle so that a tube-shaped extrusion Will be forced out of the nozzle due to the dome- References Cit d i th fil f hi t t shaped part, and a plurality of spaced holding lugs secured 5 to the closure member and to the internal curved surface UNITED STATES PATENTS in spaced relation to the latter, said cap when adjusted by 2,463,152 Clark Mar. 1, 1949 rotation on the spout with the closure member spaced 2,486,194 Moser Oct. 25, 1949 from the spout permitting the contents of the tube to be 2,618,800 Raab Nov. 25, 1952 forced out around the peripheral edge of the closure mem- 10 2,750,084 Moran June 12, 1956 

